A EPA United States Environmental Protection Agency Revisions to the Unregulated Contaminant Monitoring Rule for the Fifth Monitoring Cycle (UCMR 5): Public Meeting and Webinar Held April 6 and 7, 2021 USEPA, Office of Ground Water and Drinking Water Office of Water (MLK 140) EPA 815-A-21 -001 April 2021 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Revisions to the Unregulated Contaminant Monitoring Rule for the Fifth Monitoring Cycle (UCMR 5) Public Meeting by Webinar April 6 and 7, 2021 U.S. EPA Office of Ground Water and Drinking Water Welcome Greg Carroll, U.S. EPA Office of Ground Water and Drinking Water Standards and Risk Management Division Technical Support Center ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Agenda Day 1/Day 2 (Eastern Time) Topics 8:45-9:00am / 12:45-l:00pm Log into the Meeting 9:00-9:10am / l:00-l:10pm Welcome, Logistics, Agenda 9:10-9:25am/ l:10-l:25pm Overview of the UCMR Program 9:25-9:45am / l:25-l:45pm The Proposed UCMR 5 9:45-10:15am / l:45-2:15pm UCMR 5 Proposed Contaminants and Methods 10:15-10:20am / 2:15-2:20pm Representative Sampling 10:20-10:30am / 2:20~2:30pm UCMR 5 Reporting 10:30-10:45am / 2:30-2:45pm Break 10:45-ll:15am / 2:45-3:15pm Laboratory Approval Process & MRLs ll:15-12:15pm / 3:15-4:15pm Stakeholder Statements & Discussion 12:15-12:30pm / 4:15-4:30pm Submitting Public Comments & Closing Remarks April 2021 U.S. Environmental Protection Agency Slide 3 of 139 Webinar Tips Webinar Slides Located under "Handouts" in the right navigation bar on your screen Slides contain all content that will be discussed Webinar Audio Listen only mode until the discussion at the end Webinar Support Send email to UCMRWebinar@cadmusgroup.com e.g., "I can hear you speaking, but I cannot see the slides." April 2021 U.S. Environmental Protection Agency Slide 4 of 139 Page 2 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Questions on the Presentation Click on "+" next to "Questions" in the control panel (Figure 1) to submit questions/comments Type a question in the box; click send (Figure 2) Submit general clarifying questions throughout the webinar Questions will be answered in the che box throughout the presentation Common questions will be answered the end of each section April 2021 U.S. Environmental Protection Agency Slide 5 of 139 Specific PWS & Laboratory Questions about UCMR 5 Public Water System (PWS)-Specific Questions UCMR Sampling Coordinator@epa.gov "My water system has five entry points, but we share three of those points with another water system. Where do I sample?" Laboratory-Specific Questions UCMR Lab Approval@epa.gov "My laboratory merged with another laboratory since the last UCMR cycle, can we change our laboratory ID?" April 2021 U.S. Environmental Protection Agency Slide 6 of 139 Figure 1 (t) Roils (0/0) 13c H Chat Figure 2 It at (Eฎ f~l Questions m iJlj ฉ [Enter a question for staff) Page 3 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Comments on the UCMR 5 Proposed Rule Go to http://www.regulations.gov Enter Docket ID EPA-HQ-GW-2020-0530 Click Search button April 2021 U.S. Environmental Protection Agency Slide 7 of 139 Comment Process/Accessing Docket The UCMR 5 docket should pop up on the next screen Click on the Comment button below the Proposed Rule E3 PROPOSED RULE Revisions to the Unregulated Contaminant Monitoring Rule for Public Water Systems; Public Meeting Comments Due May 10.2021 April 2021 U.S. Environmental Protection Agency Slide 8 of 139 Page 4 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Comment Process/Accessing Docket Enter comment and all required information on next screen Upload a document by clicking on the Browse... button Click on the Submit Comment button at the bottom of the page April 2021 U.S. Environmental Protection Agency Slide 9 of 139 Comment Process/Accessing Docket Once submitted, comments cannot be edited or removed Do not electronically submit any information you consider to be Confidential Business Information (CBI) Multimedia submissions (audio, video, etc.) must be accompanied by a written comment Written comment is considered the official comment and should include discussion of all points you wish to make EPA public comment policy is at: http://www.epa.gov/dockets/commenting-epa-dockets Comments/questions/statements raised during this meeting are not registered as official public comments April 2021 U.S. Environmental Protection Agency Slide 10 of 139 Write a Comment Read Agency Guidelines | Commenter's Checklist Comment" Start typing comment here 5000 Attach Files You can attach up to 20 files, but each fUe cannot exceed 10MB Valid file types include, bmp, docx. gif, jpg jpeg, pdf, png, pptx. rtf, sgml, tif, tiff. txt. wpd, xlsx. xmL Page 5 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) General Meeting Information Purpose Announce the UCMR 5 proposal for public comment Provide an opportunity for stakeholders to learn and discuss aspects of the UCMR 5 proposal: Monitoring requirements Analyte selection and rationale Analytical methods Representative monitoring Reporting requirements Laboratory approval process Webinar lines are muted to minimize background noise Discussion at the end of the webinar April 2021 U.S. Environmental Protection Agency Slide 11 of 139 Overview of the Unregulated Contaminant Monitoring Rule Program Brenda Bowden, U.S. EPA Office of Ground Water and Drinking Water Standards and Risk Management Division Technical Support Center Page 6 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Overview Regulatory background for UCMR, relationship to other Safe Drinking Water Act (SDWA) programs Contaminant Candidate List (CCL) The Unregulated Contaminant Monitoring Rule (UCMR) UCMR objective History of UCMR Regulatory Determinations National Primary Drinking Water Regulations (NPDWRs) Six-Year Review April 2021 U.S. Environmental Protection Agency Slide 13 of 139 The Safe Drinking Water Act (SDWA) Enacted in 1974, the SDWA authorized the Environmental Protection Agency (EPA) to set enforceable health standards for contaminants in drinking water National Primary Drinking Water Regulations (NPDWRs) The 1986 SDWA amendments were the basis for the original "UCM" program State drinking water programs managed the original UCM program Public Water Systems (PWSs) serving > 500 people were required to monitor The 1996 SDWA amendments changed the process of developing and reviewing NPDWRs CCL UCMR (EPA~managed) Regulatory Determination Six-Year Review April 2021 U.S. Environmental Protection Agency Slide 14 of 139 Page 7 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) General Flow of the SDWA Regulatory Processes CCL +t UCMR Monitoring Results UCMR Regulatory Determination Preliminary Regulatory Determinations Final Regulatory Determinations No further action required if decision is to not regulate May develop health advisory Rule Public Review and Comment ^Research Needs Assessment Review Proposed Rule f (NPDWR) ฆ i I ฆ 1 18 ^ months Bs Final Rule Six-Year Review of (NPDWR) Existing NPDWRs Increased specificity and confidence in the type of supporting data used (e.g., health, occurrence, treatment) is needed at each stage April 2021 U.S. Environmental Protection Agency Slide 15 of 139 The Contaminant Candidate List (CCL) The SDWA 1412(b)(1)(B) required EPA to establish a listing of contaminants that are: Not subject to any proposed or promulgated NPDWR Known or anticipated to occur in PWSs May require regulation under the SDWA List must be published every 5 years The Final CCL 4 was published November 17, 2016 and includes 97 chemicals or chemical groups and 12 microbes April 2021 U.S. Environmental Protection Agency Slide 16 of 139 Page 8 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) General Flow of the SDWA Regulatory Processes CCL f n N Draft UCMR If \ Final UCMR \ UCMR Monitoring Results ฆ UCMR J Regulatory Determination Preliminary Regulatory Determinations Rule Public Review and Comment ^Research Needs Assessment Review Y 24 Final Regulatory months Proposed Rule Determinations (NPDWR) No further action required if decision is to not regulate May develop health advisory !2k Six-Year Review of Existing NPDWRs Increased specificity and confidence in the type of supporting data used (e.g., health, occurrence, treatment) is needed at each stage April 2021 U.S. Environmental Protection Agency Slide 17 of 139 The Unregulated Contaminant Monitoring Rule (UCMR) The SDWA section 1445(a)(2), as amended in 1996, established requirements for the UCMR Program: Issue a list of no more than 30 priority unregulated contaminants in drinking water, once every 5 years Require PWSs serving a population >10,000 people as weii as a nationally representative sample of small PWSs serving <10,000 people to monitor Make analytical results publicly available in the National Contaminant Occurrence Database for Drinking Water (NCOD) The EPA funds shipping/analytical costs for small PWSs The EPA manages program in partnership with States, tribes, and territories (hereafter referred to as "States") that volunteer to assist April 2021 U.S. Environmental Protection Agency Slide 18 of 139 Page 9 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Objective of the UCMR Program Collect nationally representative occurrence data for unregulated contaminants that may require regulation under the SDWA Consider data collected as part of future EPA decisions on actions to protect public health Provide data to States, local governments, and to the public for their use in decisions regarding public health protection National occurrence data publicly available: http://www.epa.gov/dwucmr/occurrence-data-unregulated- contaminant-monitoring-rule April 2021 U.S. Environmental Protection Agency Slide 19 of 139 History of the UCMR UCMR 1 (2001-2005) Published in Federal Register (FR) on September 17,1999 UCMR 2 (2007-2011) Published in FR on January 4, 2007 UCMR 3 (2012-2016) Published in FR on April 16, 2012 UCMR 4 (2017-2021) Published in FR on December 20, 2016 PWSs collected samples 2018-2020 UCMR 5 (2022-2026) Proposed rule published on March 11, 2021 (86 FR 13846) Anticipates PWSs collecting samples 2023-2025 Each new UCMR cycle is established via a revision to the rule for the ongoing/preceding cycle April 2021 U.S. Environmental Protection Agency Slide 20 of 139 Page 10 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) General Flow of the SDWA Regulatory Processes CCL f~~; > Regulatory Determination Preliminary Regulatory Determinations UCMR Monitoring Results UCMR Final Regulatory Determinations No further action required if decision is to not regulate May develop health advisory Public Review and Comment ^Research Needs Assessment Review Six-Year Review of Existing NPDWRs Increased specificity and confidence in the type of supporting data used (e.g., health, occurrence, treatment) is needed at each stage April 2021 U.S. Environmental Protection Agency Slide 21 of 139 Every five years, the Administrator shall, after notice of the preliminary determination and opportunity for public comment, for not fewer than five contaminants included on the CCL, make determinations on whether to regulate such contaminants The SDWA requires the EPA to publish a maximum contaminant level goal (MCLG) and promulgate a NPDWR for a contaminant if the Administrator determines that: 1. The contaminant may have an adverse effect on the health of persons; 2. The is known to occur or there is substantial likelihood that the contaminant will occur in PWSs with a frequency and at levels of public health concern; and 3. In the sole judgment of the Administrator, regulation of such contaminant presents a meaningful opportunity for health risk reduction for persons served by PWSs *SDVZA Section 1412(b)(1) April 2021 U.S. Environmental Protection Agency Slide 22 of 139 Page 11 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) General Flow of the SDWA Regulatory Processes CCL Regulatory Public Review and Comment ^Research Needs Assessment Review UCMR Monitoring Results UCMR May develop health advisory !2k Six-Year Review of Existing NPDWRs Increased specificity and confidence in the type of supporting data used (e.g., health, occurrence, treatment) is needed at each stage April 2021 U.S. Environmental Protection Agency Slide 23 of 139 National Primary Drinking Water Regulations (NPDWR) For each contaminant that the Administrator determines to regulate, the Administrator shall publish MCLGs and promulgate, by rule, NPDWRs. The Administrator shall: Propose the MCLG and NPDWRs for a contaminant not later than 24 months after the determination to regulate Publish a MCLG and promulgate a NPDWR within 18 months after the proposal thereof * A NPDWR shall take effect three years after the date on which the regulation is promulgated. The Administrator, or a State, may allow this period to be extended up to two additional years if it determines that additional time is necessary for capital improvements April 2021 U.S. Environmental Protection Agency Slide 24 of 139 Page 12 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) General Flow of the SDWA Regulatory Processes CCL Regulatory Public Review and Comment ^Research Needs Assessment Increased specificity and confidence in the type of supporting data used (e.g., health, occurrence, treatment) is needed at each stage April 2021 U.S. Environmental Protection Agency Slide 25 of 139 Six-Year Review The SDWA Section 1412(b)(9) requires review and revision, as appropriate, of each NPDWR not less often than every six years. The review includes: Re-evaluation of health effects, occurrence, exposure, analytical methods, treatment feasibility, risk-balancing and implementation issues Any revision of a NPDWR shall maintain, or provide for greater, protection of the health of persons April 2021 U.S. Environmental Protection Agency Slide 26 of 139 Page 13 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) The Proposed UCMR 5 Brersda Bowden, U.S. EPA Office of Ground Water and Drinking Water Standards and Risk Management Division Technical Support Center America's Water Infrastructure Act (AWIA) National Defense Authorization Act (NDAA) Sampling and statistical design PWS types UCMR monitoring tiers Applicability Sampling schedules Sampling frequency and locations Timeline of activities Implementation roles Cost estimates April 2021 U.S. Environmental Protection Agency Slide 28 of 139 Page 14 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) America's Water Infrastructure Act (AWIA) of 2018 The SDWA was amended in 2018 by Public Law 115-270 AWIA section 2021 Enacted October 23, 2018 Key changes to the UCMR (SDWA section 1445(j)): Require PWSs serving between 3,300 and 10,000 to monitor Ensure that only a representative sample of PWSs serving fewer than 3,300 people monitor Limitations: Subject to the availability of appropriations and sufficient laboratory capacity to accommodate the analyses Authorization of Appropriations: Additional $15,000,000 in each fiscal year for which sampling is required to be carried out Under the AWIA provisions, EPA continues to be responsible for all analytical costs associated with monitoring at systems serving 10,000 or fewer people April 2021 U.S. Environmental Protection Agency Slide 29 of 139 National Defense Authorization Act (NDAA) for Fiscal Year 2020 Section 7311 of the NDAA (Public Law 116-92) requires EPA to include each Per- and Polyfluoroalkyl Substance (PFAS) in UCMR 5 for which a drinking water method has been validated by the Administrator and that are not subject to a NPDWR Page 15 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Sampling and Statistical Design Design vetted with stakeholders, peer reviewed and undergone four rounds of public comment Data Quality Objectives for the Representative Sample Provides occurrence data for unbiased national exposure estimates The statistical design: Stratifies by system size and source water type Allocates PWSs across the strata proportional to population served with at least two PWSs allocated to each State April 2021 U.S. Environmental Protection Agency Slide 31 of 139 Selection of Nationally Representative PWSs The document "Selection of Nationally Representative Public Water Systems for the Unregulated Contaminant Monitoring Rule: 2020 Update" is available in the docket Updates the 2001 statistical design document Describes: Refinement to the UCMR program monitoring tiers Selection of representative PWSs for Assessment Monitoring and Survey Monitoring Changes in statistical design to address the AWIA requirements Development of State Monitoring Plans that identify specific PWSs participating in the UCMR and establish sampling schedules April 2021 U.S. Environmental Protection Agency Slide 32 of 139 Page 16 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) PWS Types PWS: provides water for human consumption through pipes or other constructed conveyances to at least 15 service connections or serves an average of at least 25 people for at least 60 days a year Community Water System (CWS) PWS that supplies water to the same population year-round Non-Transient Non-Community Water System (NTNCWS) PWS that supplies water to at least 25 of the same people at least six months per year but not year-round (e.g., schools) Transient Non-Community Water System (TNCWS) (not generally included in UCMR sampling) PWS that provides water where people do not remain for long periods of time (e.g., gas stations, campgrounds) April 2021 U.S. Environmental Protection Agency Slide 33 of 139 UCMR Monitoring Tiers UCMR approach relies on using one or more of 3 monitoring tiers: Assessment Monitoring (primary approach to-date) Screening Survey Pre-Screen Testing Based on: Availability and complexity of analytical methods Laboratory capacity Sampling frequency Characteristics of PWSs performing the monitoring Other considerations (e.g., cost/burden) Assessment Monitoring is the only tier proposed for UCMR 5 April 2021 U.S. Environmental Protection Agency Slide 34 of 139 Page 17 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Assessment Monitoring Primary design objective is to determine national contaminant occurrence in PWS-supplied drinking water for the purpose of estimating national population exposure Primary tier and largest in scope Generally relies on analytical methods that use more common techniques and are expected to be widely available Consistent with the AWIA provisions, Assessment Monitoring proposed for UCMR 5 includes: Nationally representative sample of 800 small systems serving fewer than 3,300 persons Census of small systems serving between 3,300 and 10,000 persons Census of large systems serving > 10,000 persons Sampling design is population weighted Total number of systems: ~10,300 April 2021 U.S. Environmental Protection Agency Slide 35 of 139 UCMR 5 Applicability to PWSs per AWIA Small Systems (25-3,299) 800 randomly selected systems (CWSs and NTNCWSs) 800 Small Systems (3,300 -10,000) Large Systems All systems (CWSs and NTNCWSs) ~5,100 All systems (CWSs and NTNCWSs) ~4,400 (10,001 and over) TOTAL 10,300 1 Systems provide water for human consumption through pipes or other constructed conveyances to at least 15 service connections or serves an average of at least 25 people for at least 60 days a year April 2021 U.S. Environmental Protection Agency Slide 36 of 139 Page 18 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Sampling Schedules EPA initially drafts schedules for large and small PWSs Partnered State has opportunity to review and modify schedules for large and small PWSs Large PWS has opportunity to review and modify their schedule Small PWS may request that EPA modify their schedule April 2021 U.S. Environmental Protection Agency Slide 37 of 139 Sampling Frequency & Locations The UCMR 5 proposal identifies sampling frequencies and locations consistent with those used in UCMR 1 - UCMR 4 Surface Water systems (including those using ground water under the direct influence of surface water) sample four times (~3 months apart) during their year of sampling Ground Water systems sample two times (5-7 months apart) during their year of sampling Sampling is proposed at the entry points to the distribution systems (EPTDSs) April 2021 U.S. Environmental Protection Agency Slide 38 of 139 Page 19 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) 2018 2019 2020 2021 Publish Final Rule Method Development Stakeholder Meeting (June 6, 2018) Pre-Proposal Stakeholder Meeting (July 16, 2019) Applicability date February 1, 2021 Publish Proposal, 60-day Public Comment Period, Stakeholder Meeting (April 6 & 7, 2021) Publish UCMR 5 Final Rule (Anticipated Dec 2021) Post Proposal: Initiate Implementation Lab Approval Program SDWARS registration/notification/inventory for PWSs Partnership Agreements, State Monitoring Plans, PWS Inventory Ground Water Representative Monitoring Plans (GWRMP) submitted to EPA six months prior to the PWS's scheduled sample collection Outreach/trainings April 2021 U.S. Environmental Protection Agency Slide 39 of 139 2022 2023 2024 2025 2026 Pre-sampling Activity Post-sampling by EPA Sampling Period Activity Manage Lab ^^^^^EPA Implementation Activities PWSs, Laboratories Approval Program Provide compliance assistance Complete Organize Implement small system monitoring resampling, as Partnership Post data quarterly to NCOD needed Agreements and Conclude data State Monitoring PWS Sample Collection; Laboratory Analysis; reporting Plans Reporting Begin PWS SDWARS All large systems serving more than 10,000 EPA registration/ people; Complete upload inventory All small systems serving between 3,300 of UCMR 5 data Review GWRMP and 10,000 people; to NCOD submittal 800 small systems serving fewer than Conduct 3,300 people outreach/trainings April 2021 U.S. Environmental Protection Agency Slide 40 of 139 20 Page 20 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) EPA Implementation Roles Small PWS support: Maintain lab and implementation contracts to support the UCMR Compile contact and inventory information Manage sample kit distribution and tracking Responsible for data review and reporting Large arid Small PWS support: Extract data from the Safe Drinking Water Accession and Review System (SDWARS) for evaluation and reporting to the National Contaminant Occurrence Database for Drinking Water (NCOD) Support the SDWARS reporting system and users Perform inventory and schedule updates Provide technical assistance Use SDWARS for real-time communication and outreach April 2021 U.S. Environmental Protection Agency Slide 41 of 139 EPA Implementation Roles (Cont.) State, PWS, and Laboratory support: Review and track PWS applicability and sampling progress Coordinate Laboratory Approval Program Provide technical support Coordinate outreach Compliance assistance and enforcement efforts April 2021 U.S. Environmental Protection Agency Slide 42 of 139 Page 21 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Extended UCMR Implementation Team EPA Office of Ground Water and Drinking Water (OGWDW) Lead organization for direct-implementation of rule EPA Regional Offices Coordinate State Partnership Agreements Assist States and PWSs with UCMR requirements, compliance assistance, and enforcement Partnering States Support various aspects of implementation based on state-specific interest April 2021 U.S. Environmental Protection Agency Slide 43 of 139 States' Role in the UCMR Program Participation by States is voluntary and documented via Partnership Agreements States help the EPA implement the UCMR program; help to ensure high data quality Partnership Agreement activities can include any/all of the following: Review and revise State Monitoring Plans Provide inventory and contact information for small and large PWSs Review proposed Ground Water Representative Monitoring Plans (GWRMPs) Provide compliance assistance (e.g., notify and instruct systems) Collect samples Other April 2021 U.S. Environmental Protection Agency Slide 44 of 139 Page 22 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) EPA Responsibilities on behalf of Small PWSs EPA funds costs associated with analyses and shipping for small PWSs (i.e., those serving 10,000 or fewer people) EPA engages States and PWSs to collect samples EPA coordinates sample analyses with contracted laboratories and funds the analyses EPA examines the results along with quality control (Q.C) data and makes results available via SDWARS April 2021 U.S. Environmental Protection Agency Slide 45 of 139 Large PWS Responsibilities PWSs serving more than 10,000 people are responsible for the costs associated with analyses PWS coordinates sample analyses with an approved laboratory Laboratories post the data to SDWARS PWS reviews and can act upon (e.g., approve) data in SDWARS States have access to results following large PWS review period April 2021 U.S. Environmental Protection Agency Slide 46 of 139 Page 23 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) UCMR 5 Cost Estimates Estimated Average Annual Costs of the Proposed UCMR 5 Over the Five-year Cycle1 Entity Avg. Annual Cost (Million) (2022-2026)2 Small Systems (25-10,000), including labor3 only (non-labor costs4 paid for by the EPA) SO. 3 Large Systems (10,001-100,000), including labor and non-labor costs $7.2 Very Large Systems (100,001 and greater), including labor and non-labor costs $2.3 States, including labor costs related to implementation coordination $0.8 EPA, including labor for implementation and non-labor for small system testing $10.5 AVERAGE ANNUAL NATIONAL TOTAL (over the period of 2022-2026) $21.1 1. Based on the scope of small-system monitoring described in AWIA. 2. Totals may not equal the sum of components due to rounding. 3. Labor costs pertain to systems, States, and EPA. Costs include activities such as reading the rule, notifying systems selected to participate, sample collection, data review, reporting and record keeping. 4. Non-labor costs will be incurred primarily by EPA and by large and very large PWSs. They include the cost of shipping samples to laboratories for testing and the cost of the laboratory analyses. April 2021 U.S. Environmental Protection Agency Slide 47 of 139 UCMR 5 Proposed Contaminants and Analytical Methods Melissa Simic, U.S. EPA Office of Ground Water and Drinking Water Standards and Risk Management Division Technical Support Center ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Overview Candidate selection process and rationale Proposed contaminants and analytical methods Health and occurrence data sources Contaminant-specific information by method Other contaminants considered during development of UCMR 5 proposal Information Compendium April 2021 U.S. Environmental Protection Agency Slide 49 of 139 118 contaminants on CCL 4+ 339 method related non-CCL 4 contaminants (includes contaminants monitored for under UCMRs 1,2,3 or 4) = 457 contaminants 21 contaminants on CCL4+ 187 method related non-CCL4 contaminants = 208 contaminants All contaminants on the CCL 4 Other contaminants within the scope of methods for CCL 4 contaminants All contaminants previously monitored under the UCMR 1, 2, 3, or 4 12 CCL 4+19 workgroup nominations + 38 method related non-CCL4 contaminants = 69 contaminants [13 methods] Not currently regulated or previous regulatory determination May occur in drinking water Not monitored for on UCMR 1,2,3, or 4 (with the exception of PFAS) Expected to have a completed, validated drinking water method in time for rule proposal 30 contaminants proposed for comment Additional contaminant attributes: Have an available health assessment to facilitate regu latory determinations Have high public interest (e.g., PFAS) Are addressed in EPA's PFAS Action Plan Are specified in Section 7311 of NDAA Have critical health endpoints, probable carcinogens Have active use (e.g., registered pesticides) April 2021 U.S. Environmental Protection Agency Slide 50 of 139 Page 25 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) PFAS as UCMR 5 Candidate Contaminants National Defense Authorization Act for Fiscal Year 2020 (NDAA) (Public Law 116-92) "The EPA Administrator shall include each PFAS in UCMR 5 for which a drinking water method has been validated by the Administrator and that are not subject to a NPDWR" EPA's 2019 Per- and Polyfluoroalkyl Substances (PFAS) Action Plan: https://www.epa.gov/pfas/epas-pfas-action-plan UCMR 5 Commitment: The EPA will propose nationwide drinking water monitoring for PFAS under the next UCMR monitoring cycle utilizing newer methods available to detect more PFAS chemicals and at lower minimum reporting levels (MRLs) than previously possible in earlier monitoring Proposal included all 29 PFAS that are within the scope of EPA Methods 533 and 537.1. Six of the 29 PFAS were part of UCMR 3. UCMR 5 monitoring for those six would involve lower MRLs April 2021 U.S. Environmental Protection Agency Slide 51 of 139 EPA Method 533 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS) 4,8-dioxa-3H-perfluorononanoic acid (ADONA) 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS) Hexafluoropropylene oxide dimeracid (HFPO-DA) (GenX) 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS) Perfluorobutanesulfonic acid (PFBS) Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) Perfluorodecanoic acid (PFDA) Pertluoro (2-ethoxyethane) sulfonic acid (PFEESA) Perfluorododecanoic acid (PFDoA) Pertluoro-3-methoxypropanoic acid (PFMPA) Perfluoroheptanoic acid (PFHpA) Perfluoro-4-methoxybutanoic acid (PFMBA) Perfluorohexanoic acid (PFHxA) Perfluorobutanoic acid (PFBA) Perfluorohexanesulfonic acid (PFHxS) Perfluoroheptanesulfonicacid (PFHpS) Perfluorononanoic acid (PFNA) Pertluoropentanesulfonic acid (PFPeS) Perfluorooctanesulfonic acid (PFOS) Perfluoropentanoic acid (PFPeA) Perfluorooctanoicacid (PFOA) ll-chloroeicosafluoro-3-oxaundecane-l-sulfonic acid (HCI-PF30UdS) Perfluoroundecanoic acid (PFUnA) 9-chlorohexadecafluoro-3-oxanone-l-sulfonic acid (9CI-PF30NS) PFAS Analytes Unique to EPA Method 537.1 N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) Perfluorotetradecanoic acid (PFTA) N-methyl perfiuorooctanesulfonamidoacetic acid (NMeFOSAA) Perfluorotridecanoic acid (PFTrDA) EPA Method 200.7 or alternate SM 3120 B or ASTM D1976-20 Lithium Bold= PFAS monitored under UCMR 3 Page 26 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) EPA Health Assessment Data Sources The Health Values are: Not federally enforceable Subject to change as health effects information becomes available Office of Research and Development Integrated Risk Information System (IRIS) https://cfpub.epa.gov/ncea/iris drafts/AtoZ.cfm Provisional Peer-Reviewed Toxicity Values (PPRTVs) https://www.epa.gov/pprtv/provisional-peer-reviewed-toxicity- values-pprtvs-assessments Office of Water Health Advisory (HA) or Health Effects Support Documents (HESD) https://www.epa.gov/dwstandardsregulations/drinking-water- contaminant-human-health-effects-information April 2021 U.S. Environmental Protection Agency Slide 53 of 139 Non-EPA Health Data Sources Available non-EPA health assessments were also considered, e.g. Agency for Toxic Substances and Disease Registry (ATSDR) Toxicological Profiles https://www.atsdr.cdc.gov/toxprofiledocs/index.html World Health Organization (WHO) International Agency for Research on Cancer (IARC) Monographs https://monographs.iarc.fr/ Health Canada Guidelines for Canadian Drinking Water Quality https://www.canada.ca/en/health-canada/services/environmental- workplace-health/reports-publications/water-qualitv.html#tech doc Center for Disease Control and Prevention's Morbidity and Mortality Weekly Reports (MMWR) https://www.cdc.gov/mmwr/index.html April 2021 U.S. Environmental Protection Agency Slide 54 of 139 Page 27 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Occurrence Data Sources Finished Water Data Unregulated Contaminant Monitoring Rule (UCMR) (UCMR 3) (2013-2015) National Inorganics and Radionuclides Survey (NIRS) (1984 - 1986) Disinfection Byproduct Information Collection Rule (DBP-ICR) Data (1997 -1998) State and Local Occurrence Studies Supplemental Drinking Water and Ambient Water Data U.S. Geological Survey (USGS), Ambient Water National Water-Quality Assessment Program (NAWQA) April 2021 U.S. Environmental Protection Agency Slide 55 of 139 Other Data Sources Persistent, Bioaccumulative and Toxic (PBT) Profiler Chemical Data Reporting (CDR) under the Toxic Substance Control Act (TSCA) Interstate Technology Regulatory Council (ITRC) EPA's CompTox Chemicals Dashboard Hazardous Substances Data Bank (HSDB) April 2021 U.S. Environmental Protection Agency Slide 56 of 139 Page 28 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Per- and Polyfluorinated Alky I Substances EPA Method 5331 (SPE LC/MS/MS) Location: EPTDS Analyte Health Information Critical Health Effect Occurrence 1 l-chloroeicosafluoro-3- oxauridecane-l-sulfonic acid (llCl-PF30UdS) No EPA health assessment NA No occurrence data available in the data sources reviewed 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS) No EPA health assessment NA No occurrence data available in the data sources reviewed 1H, 1H, 2H, 2H-perfluorohexarie sulfonic acid (4:2 FTS) No EPA health assessment NA No occurrence data available in the data sources reviewed 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS) No EPA health assessment NA No occurrence data available in the data sources reviewed 1. Determination of Per- and Polyfluoroalkyl Substances in Drinking Water by Isotope Dilution Anion Exchange Solid Phase Extraction and Liquid Chromatography/Tandem Mass Spectrometry. November 2019. April 2021 U.S. Environmental Protection Agency Slide 57 of 139 Per- and Polyfluorinated Alky I Substances EPA Method 533 (SPE LC/MS/MS) Location: EPTDS Analyte Health Information Critical Health Effect Occurrence 4,8-dioxa-3H-perfluorononanoic acid (ADONA)1 No EPA health assessment NA No occurrence data available in the data sources reviewed 9-chlorohexadecafluoro-3- oxanone-l-sulfonic acid (9CI- PF30NS) No EPA health assessment NA No occurrence data available in the data sources reviewed hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX) 2018 Draft EPA Toxicity Values2: Draft Candidate Chronic Reference Dose (RfD) = 0.00008 mg/kg-day Draft Candidate Subchronic RfD = 0.0002 mg/kg-day NA No occurrence data available in the data sources reviewed 1.4,8-dioxa-3H-perfluorononanoic acid is 2. Draft EPA Toxicity Assessment, 2018 the parent acid form of the ammonium salt April 2021 U.S. Environmental Protection Agency Slide 58 of 139 Page 29 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Per- and Polyfluorinated Alky! Substances EPA Method 533 (SPE LC/MS/MS) Location: EPTDS Analyte Health Information Critical Health Effect Occurrence nonafluoro-3,6-dioxaheptanoic No EPA health NA No occurrence data available in the data acid (NFDHA) assessment sources reviewed perfluoro (2-ethoxyethane) No EPA health NA No occurrence data available in the data sulfonic acid (PFEESA) assessment sources reviewed perfluoro-3-methoxypropanoic No EPA health NA No occurrence data available in the data acid (PFMPA) assessment sources reviewed perfluoro-4-methoxybutanoic No EPA health NA No occurrence data available in the data acid (PFMBA) assessment sources reviewed April 2021 U.S. Environmental Protection Agency Slide 59 of 139 Per- and Polyfluorinated Alky I Substances EPA Method 533 (SPE LC/MS/MS) Location: EPTDS Analyte Health Information Critical Health Effect Occurrence perfluorobutanesulfonic acid (PFBS) EPA PPRTV12014: Chronic Provisional Reference Dose (p-RfD) = 0.02 mg/kg-day; Subchronic p-RfD = 0.2 mg/kg-day Draft EPA Toxicity Values, 20182: Draft Candidate Chronic RfD = 0.01 mg/kg- day (thyroid or kidney) Draft Candidate Subchronic RfD = 0.04 (thyroid) and 0.1 mg/kg-day (kidney) Increased incidence of kidney hyperplasia UCMR 33: Detected in 0.16% of PWSs at concentrations greater than or equal to 0.09 ug/L (Minimum Reporting Level [MRL]). Boone et al., 20194: Detected in 96% of partially treated samples from 25 PWSs; median detected 0.00117 ug/L perfluorobutanoic acid (PFBA) EPA Integrated Risk Information System (IRIS) assessment in process NA Boone et al., 2019: Detected in 88% of partially treated samples from 25 PWSs; median detected 0.00362 ug/L perfluorodecanoic acid (PFDA) EPA IRIS assessment in process NA Boone et al., 2019: Detected in 52% of partially treated samples from 25 PWSs; median detected 0.00033 ug/L. 1. EPA Provisional Peer-Reviewed Toxicity Value (PPRTV), 2014 2. D raft E PA Tox ic ity Assessme nt, 2 018 3. UCMR 3, 2013-2015: Finished drinking water occurrence data 4. Finished drinking water occurrence study. "Per- and polyfluoroalkyl substances in source and treated drinking waters of the United States." Science of The Total Environment 653 (February 2 5) :3 59-369. April 2021 U.S. Environmental Protection Agency Slide 60 of 139 Page 30 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Per- and Polyfluorinated Alky! Substances EPA Method 533 (SPE LC/MS/MS) Location: EPTDS Analyte Health Information Critical Health Effect Occurrence perfluorododecanoic acid (PFDoA) No EPA health assessment NA Boone et alv 20191: Detected in 4% of partially treated samples from 25 PWSs; median detected 0.00009 ug/L perfluoroheptanesulfonic acid (PFHpS) No EPA health assessment NA No occurrence data available in the data sources reviewed perfluoroheptanoic acid (PFHpA) No EPA health assessment NA UCMR 32: Detected in 1.75% of PWSs at greater than or equal to 0.01 ug/L (MRL) Boone et al., 2019: Detected in 92% of partially treated samples from 25 PWSs; median detected 0.00079 ug/L 1. Finished drinking water occurrence study. "Per- and polyfluoroalkyl substances in source and treated drinking waters of the United States." Science of The Total En viron men f 653 (Fe b rua ry 25):359-369 2. UCMR 3, 2013-2015: Finished drinking water occurrence data April 2021 U.S. Environmental Protection Agency Slide 61 of 139 Per- and Polyfluorinated Alky I Substances EPA Method 533 (SPE LC/MS/MS) Location: EPTDS Analyte Health Information Critical Health Effect Occurrence perfluorohexanesulfonic Draft ATSDR1, 2018: provisional Thyroid follicular UCMR 32: Detected in 1.12% of PWSs at acid (PFHxS) Minimal Risk Level = 0.00002 mg/kg-day (intermediate duration) EPA IRIS assessment in process cell damage greater than or equal to 0.03 ug/L (MRL) Boone etal., 20193: Detected in 80% of partially treated samples from 25 PWSs; median detected 0.00079 ug/L perfluorohexanoic acid EPA IRIS assessment in process NA Boone etal., 2019: Detected in 100% of (PFHxA) partially treated samples from 25 PWSs; median detected 0.00143 ug/L perfluorononanoic acid Draft ATSDR, 2018: provisional Decreased pup UCMR 3: Detected in 0.28% of PWSs at (PFNA) Minimal Risk Level = 0.000003 body weight and greater than or equal to 0.02 ug/L (MRL) mg/kg-day (intermediate duration) developmental delays Boone, etal., 2019: Detected in 88% of partially treated samples from 25 PWSs; EPA IRIS assessment in process median detected 0.00074 ug/L 1. Draft Agency for Toxic Substances and Disease Registry (ATSDR), 2018: "Toxico logical Profile for Perfluoroa Iky Is" 2. UCMR 3, 2013-2015: Finished drinking water occurrence data 3. Finished drinking water occurrence study. "Per- and polyfluoroalkyl substances in source and treated drinking waters of the United States." Science of The Total En viron men f 653 (Fe b rua ry 25):359-369 Page 31 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Per- and Polyfluorinated Alky! Substances EPA Method 533 (SPE LC/MS/MS) Location: EPTDS Analyte Health Information Critical Health Effect Occurrence perfluorooctanesulfonic acid EPA HA1: 0.07 ug/L (chronic) Reduced pup body weight in UCMR 34: Detected in 1.93% of PWSs at (PFOS) EPA HESD2, 2016: RfD = the two-generation study in greater than or equal to 0.04 ug/L (MRL) 0.00002 mg/kg-day rats Boone et al., 20195: Detected in 80% of Health Canada, 20183: partially treated samples from 25 PWSs; MAC = 0.6 ug/L median detected 0.00162 ug/L perfluorooctanoic acid EPA HA1: 0.07 ug/L (chronic) Pup reduced ossification UCMR 3: Detected in 2.38% of PWSs at (PFOA) and accelerated male greater than or equal to 0.02 ug/L (MRL) EPA HESD2, 2016: RfD= 0.00002 mg/kg-day; 10 4 Cancer Risk = 50 ug/L puberty, decreased antibody protection and increased adult kidney weight with decreased body Boone et al., 2019: Detected in 76% of partially treated samples from 25 PWSs; median detected 0.00415 ug/L Health Canada, 20183: weight MAC = 0.2 ug/L 1. EPA Health Advisory for PFOA and PFOS, 2016; Non-cancer health value; Not federally enforceable 2. EPA Health Effects Support Document (HESD); Not federally enforceable 3. Health Canada Guidelinesfor Canadian Drinking Water Quality, Maximum Acceptable Concentration (MAC); Not federally enforceable 4. UCMR 3, 2013-2015: Finished drinking water occurrence data 5. Finished drinking water occurrence study. "Per- and polyfluoroalkyl substances in source and treated drinking waters of the United States." Science of The Total Environment 653 (February 25):359-369" April 2021 U.S. Environmental Protection Agency Slide 63 of 139 Per- and Polyfluorinated Alky I Substances EPA Method 533 (SPE LC/MS/MS) Location: EPTDS Analyte Health Information Critical Health Effect Occurrence perfluoropentanesulfonic acid (PFPeS) No EPA health assessment NA No occurrence data available in the data sources reviewed perfluoropentanoic acid (PFPeA) No EPA health assessment NA Boone etal., 20191: Detected in 96% of partially treated samples from 25 PWSs; median detected 0.00178 ug/L perfluoroundecanoic acid (PFUnA) No EPA health assessment NA Boone etal., 2019: Detected in 16% of partially treated samples from 25 PWSs; median detected 0.00054 ug/L Quinones and Snyder, 20092: The mean concentration detected in 1 of 7 PWSs with varying degrees of wastewater impact 0.0019 |ig/L (Detects are concentrations greater than or equal to a method reporting limit of 0.001 ug/L) 1. Finished drinking water occurrence study. "Per- and polyfluoroalkyl substances in source and treated drinking waters of the United States." Science of The Total En viron men 1653 (Fe b rua ry 25):359-369 2. Finished drinking water occurrence study. "Occurrence of perfluoroalkyl carboxylates and sulfonates in drinking water utilities and related waters from the United States." Environmental Science & Technology 43(24): 9089- 9095. April 2021 U.S. Environmental Protection Agency Slide 64 of 139 Page 32 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Per- and Polyfluorinated Alky! Substances Using EPA Method 537.11 (LC/MS/MS) Location: EPTDS Analyte Health Information Critical Health Effect Occurrence N-ethyl perfluorooctariesulfonamidoacetic acid (NEtFOSAA) No EPA health assessment NA No occurrence data available in the data sources reviewed N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) No EPA health assessment NA No occurrence data available in the data sources reviewed Perfluorotetradecanoic acid (PFTA) No EPA health assessment NA Boone et a I., 20192: Detected in 0% of partially treated samples from 25 PWSs. Perfiuorotridecanoic acid (PFTrDA) No EPA health assessment NA Boone et a I., 2019: Detected in 0% of partially treated samples from 25 PWSs. 1. Determination of Selected Per- and Polyfluorinated Alky 1 Substances in Drinking Water by Solid Phase Extraction and Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS), Version 2.0. March 2020. 2. Finished drinking water occurrence study. "Per- and polyfluoroalkyl substances in source and treated drinking waters of the United States." Science of The Total En viron men f 653 (Fe b rua ry 25):359-369 April 2021 U.S. Environmental Protection Agency Slide 65 of 139 Lithium (Metal/Pharmaceutical) EPA Method 200.71 (ICP-AES) Location: EPTDS Analyte Health Information Critical Health Effect Occurrence Lithium EPA PPRTV, 20082: Adverse effects in several organs and NIRS3: Detected in 551 of 988 (55.8%) p-RFD = 0.002 mg/kg- systems (e.g., kidney effects) PWSs; detection range 5-7,929 ug/L day (Chronic and Glassmeyer et al., 20174: Subchronic); lower Detected in 56% of partially treated bound of the samples from 25 PWSs (mostly therapeutic serum surface water systems); median concentration range detected 10.8 H-g/L selected as basis l. Determination of Metals and Trace Elements in Water and Wastes by Inductively Coupled Plasma-Atomic Emission Spectrometry, Revision 4.4. 1994 2. EPA Provisional Peer-Reviewed Toxicity Value (PPRTV), 2008 3. National Inorga riics and Radionuclides Survey (NIRS), 1984-1986: Finished drinking water occurrence data 4. Finished drinking water occurrence study. "Nationwide Reconnaissance of Contaminants of Emerging Concern in Source and Treated Drinking Waters of the United States." Science of the Total Environment (581-582):909-922. April 2021 U.S. Environmental Protection Agency Slide66of 139 Page 33 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Other Contaminants Considered EPA considered four haloacetonitriles and Legionella pneumophila for UCMR 5 monitoring but did not propose them for the reasons described in the Federal Register Notice EPA is examining opportunities to enhance protection against disinfection byproducts (including haloacetonitriles) and Legionella pneumophila through potential revisions to the suite of Microbial and Disinfection Byproduct (MDBP) rules, including the Surface Water Treatment Rule EPA took into consideration that UCMR 5 data collection would not be complete in time to inform regulatory revision to the MDBP rules (an anticipated proposal date of July 31, 2024 and a final rule date of September 30, 2027) and would not reflect conditions in water systems after any regulatory revisions become effective April 2021 U.S. Environmental Protection Agency Slide 67 of 139 Other Contaminants Considered Inclusion of haloacetonitriles and/or Legionella pneumophila in UCMR 5 would pose monitoring and reporting complexity and cost compared to the sampling design for PFAS and lithium Haloacetonitriles: new expense estimates of $16 million for large PWSs, $20 million for EPA [to implement small system monitoring], and $0.5 million for small PWSs and States over the 5-year UCMR period Legionella pneumophila: new expense estimates of $11 million for large PWSs, $20 million for EPA [to implement small system monitoring], and $0.5 million for small PWSs and States over the 5-year UCMR period April 2021 U.S. Environmental Protection Agency Slide 68 of 139 Page 34 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) EPA Method 551.1 (LLE/GC/ECD)1 Location: Distribution System Analyte Bromochloroacetonitril e (BCAN) Dichloroacetonitrile (DCAN) Health Information Christ etal., 19952: Maternal no-observed- adverse-effect level (NOAEL) of 45 mg/kg/day and maternal lowest-observed-adverse-effect level (LOAEL) of 65 mg/kg/day in rats when BCAN was administered in tricaprylin; Maternal LOAEL of 5 mg/kg/day in rats, BCAN administered in tricaprylin Smith et al., 19864: LOAEL in rats of 55 mg/kg/day when DCAN was administered in tricaprylin (based) Smith et al., 19895: Maternal and fetal NOAEL in rats of 15 mg/kg/day when DCAN was administered in tricaprylin Critical Health Effect Decreased maternal weight and increased dam mortality; Developmental and teratogenic effects Developmental toxicity Increased liver weight in the dams and decreased fetal weight and length and an increase in soft tissue malformations, respectively Occurrence DBP-ICR3: Detected in 62.5% PWS; 50th percentile = 0.7 ug/L, 90th percentile = 2.6 ug/L DBP-ICR: Detected in 70.1% PWSs; 50th percentile = 1.3 ug/L, 90th percentile = 4.4 ug/L 1. Determination of Chlorination Disinfection Byproducts, Chlorinated Solvents, and Halogenated Pesticides/Herbicides in Drinking Water by Liquid-Liquid Extraction and Gas Chromatography with Electron-Capture Detection, Revision 1.0,1995 2. The developmental toxicity of bromochloroacetonitrile in pregnant Long-Evans rats. International Journal of Environmental Health Research 5(2):175-188. 3. Disinfection Byproduct Information Collection Rule (DBP-ICR) Data (1997 - 1998): Distribution system occurrence data 4. "Reproductive toxicology of disinfection by-products." Environmental Health Perspectives. 69:177-182. 5. "Developmental toxicity of dichloroacetonitrile: a by-product of drinking water disinfection." Fundamental and Applied Toxicology. 12(4): 765-772. April 2021 U.S. Environmental Protection Agency Slide 69 of 139 EPA Method 551.1 (LLE/GC/ECD) Location: Distribution System Analyte Dibromoacetonitrile (DBAN) Trichloroacetonitrile (TCAN) Health Information Critical Health Effect Occurrence WHO, 2004 TDI1: 0.11 mg/kg/day Decreased body DBP-ICR3: Detected in 48.6% PWSs; WHO, 1999 IARC2 Cancer Classification: Possibly carcinogenic to humans (Group 2B) Christ et al., 19964: NOAEL in rats of 35 mg/kg/day and a LOAEL of 55 mg/kg/day when TCAN was administered in corn oil WHO, 1999 IARC Cancer Classification: Not classifiable as to its carcinogenicity to humans (Group 3) weight in male rats Developmental toxicity and teratogenicity 50th percentile = <0.5 ug/L, 90th percentile = 2.3 ug/L DBP-ICR: Detected in 1.7% PWS; 50th percentile = <0.5 ug/L, 90th percentile = <0.5 ug/L 1. World Health Organization (WHO), Tolerable Daily Intake (TDI) 2. International Agency for Research on Cancer (IARC) B. Disinfection Byproduct Information Collection Rule (DBP-ICR) Data (1997- 1998): Distribution system occurrence data 4, "Developmental effects of trichloroacetonitrile administered in corn oil to pregnant Long-Evans rats." Journal of Toxicology and Environmental Health 47(3):233- 47 April 2021 U.S. Environmental Protection Agency Slide 70 of 139 Page 35 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Method TBD Location: Distribution System Critical Health Analyte Health Information y Effect Occurrence Legionella MCLG1 = 0 Legionellosis, which Donohue et al., 20192: Between 2011 and pneumophila can be Legionnaires' 2017, 358 tap water samples were collected disease (a form of from 46 U.S. States and territories. Legionella pneumonia; was detected in 26% of chlorinated tap water potentially fatal samples and 22% of chloraminated tap water illness) or Pontiac samples. There was no significant difference in Fever (a milder, flu- detection frequency in hot-water or cold- like illness) water tap samples whether from chlorine- or chloramine-treated water sources 1. Legionella pneumophila is regulated via "treatment technique" with a Maximum Contaminant Level Goal (MCLG) of zero established under EPA's Surface Water Treatment Rule (54 FR 27486, June 1989) 2. Donohue et al., 2019: Finished drinking water occurrence study. "Impact on the Detection and Quantification of Legionella pneumophila and Mycobacterium Species" April 2021 U.S. Environmental Protection Agency Slide 71 of 139 Other Contaminants Considered Total Organic Fluorine (TOF): While there is high interest in TOF (and other techniques that might capture a broader suite of PFAS), the measurement approach is subject to significant technical challenges, and a robust method that would support national monitoring is unlikely to be ready in time to support UCMR 5 rulemaking 1,2,3-tricholorpropane: Included in UCMR 3. At 0.03 ng/L, the MRL established in UCMR 3 is higher than the EPA health reference level (HRL) associated with a cancer risk level of one cancer case per million people (0.0004 jig/L (0.4 ng/L), but lower than the cancer risk level associated with one cancer case per 10,000 people (0.04 |ig/L)) Available analytical methods would not support the collection of data at concentrations lower than the levels monitored during UCMR 3 April 2021 U.S. Environmental Protection Agency Slide 72 of 139 Page 36 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) UCMR 5 Contaminants EPA invites public comments on: The 30 proposed contaminants and their associated methods The additional contaminants considered for UCMR 5, but not included on the proposed list Additional contaminants that may not have been considered for UCMR 5 Additional consensus analytical methods for the proposed contaminants Go to www.regulations.gov and enter Docket ID: EPA-HQ-OW-2020-0530 to submit public comments April 2021 U.S. Environmental Protection Agency Slide 73 of 139 Information Compendium for Candidate Contaminants Provides supporting information for the 30 proposed contaminants, as well as Legionella pneumophila and four haloacetonitriles Used data sources from the Contaminant Candidate List (CCL) program to inform Background & Use Health Effects Occurrence in Water Production, Release, & Usage Persistence & Mobility Outlines the contaminant prioritization process Summarizes the data sources reviewed Includes a comprehensive list of the other contaminants that were considered, but not included on the proposed list The document "Information Compendium for Candidate Contaminants for the Proposed Unregulated Contaminant Monitoring P.ule (UCMR 5)" is available in the docket April 2021 U.S. Environmental Protection Agency Slide 74 of 139 Page 37 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Representative Samples (Optional) Derek Losh, U.S. EPA Office of Ground Water and Drinking Water Standards and Risk Management Division Technical Support Center Overview Ground Water Representative Monitoring Plan (GWRMP) Program Option for ground water systems to reduce monitoring Representative connections Option for water systems that purchase water with multiple connections from the same wholesaler April 2021 U.S. Environmental Protection Agency Slide 76 of 139 Page 38 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Ground Water Representative Monitoring Plan (GWRMP) Program Applications from ground water systems now being accepted PWSs with multiple ground water entry points to the distribution system (EPTDSs) can sample at representative sampling locations rather than at each EPTDS with EPA approval Previously-approved plans may be used for UCMR 5 if there are no significant changes in the configuration of the ground water EPTDSs since prior approval PWSs must prepare proposals for any new GWRMPs and submit them to: UCMR Sampling Coordinator@epa.gov The document "Instructions for Preparing a Ground Water Representative Monitoring Plan for the Unregulated Contaminant Monitoring Rule" is available in the docket April 2021 U.S. Environmental Protection Agency Slide 77 of 139 GWRMP Program Key GWRMP Proposal Requirements: Site map showing the locations of all wells and the proposed representative wells. Generally, represented wells should be located within a mile of the representative well Uniform contamination susceptibility among the represented wells and their representative well Historical ground water quality data demonstrating similarity among the represented wells and the representative well April 2021 U.S. Environmental Protection Agency Slide 78 of 139 Page 39 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) GWRMP Program GWRMPs approved under prior UCMRs These may be used for UCMR 5 if there are no significant changes in the configuration of the ground water EPTDSs since prior approval. The PW5 must send a message to UCMR Sampling Coordinatorffiepa.gov to confirm its intention to use the previous GWRMP If EPA does not have record of a previously-approved GWRMP, EPA will contact the PWS to request that documentation Amending GWRMPs Requests for change must also be submitted to UCMR Sampling Coordinator(5)epa.gov If new wells are being added,, the amendment request must be accompanied by the supporting information discussed on a previous slide April 2021 U.S. Environmental Protection Agency Slide 79 of 139 GWRMP Program: Change Between UCMR 4 and UCMR 5 Proposal UCMR 4 UCMR 5 Proposed Change UCMR 4 specifies "within 120 days from publication of the final rule" as the deadline to submit a GWRMP As proposed, plans must be submitted to EPA six months prior to the PWS's scheduled sample collection, instead of by a specified date Reason for considering change: Provides greater flexibility for PWSs with ground water locations to complete the GWRMP process. Those scheduled to collect samples in 2024 or 2025 would have significantly more time April 2021 U.S. Environmental Protection Agency Slide 80 of 139 Page 40 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Representative Connections Representative Connections: Water systems that purchase water with multiple connections from the same wholesaler may select one representative connection from that wholesaler Do riot need EPA approval Upload your representative connection to SDWARS April 2021 U.S. Environmental Protection Agency Slide 81 of 139 UCMR 5 Reporting Jillian Toothman, U.S. EPA Office of Ground Water and Drinking Water Standards and Risk Management Division Technical Support Center ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Overview SDWARS 5 Reporting requirements Data elements Timing of reporting April 2021 U.S. Environmental Protection Agency Slide 83 of 139 SDWARS 5 Safe Drinking Water Accession and Review System (SDWARS) used by PWSs and EPA-approved UCMR 5 laboratories to report results Internet-based electronic reporting system that utilizes a secure access portal, the Central Data Exchange (CDX), to access SDWARS 5 SDWARS 5 user instructions and trainings for labs, PWSs, and States will be available after the final rule is published April 2021 U.S. Environmental Protection Agency Slide 84 of 139 Page 42 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Large System Reporting ง141.35(c) Contact and zip code information SDWARS by December 31, 2022 Sampling location information SDWARS by December 31, 2022 Changes after December 31, 2022 must be submitted to UCMR Sampling Coordinator@epa.gov and approved by EPA Data elements PWSs must report all data elements specified in ง141.35(e) Table 1 (e.g., disinfectant type and treatment information) to SDWARS Analytical results Uploaded to SDWARS by the PWS' laboratory Reviewed and submitted by PWS in SDWARS April 2021 U.S. Environmental Protection Agency Slide 85 of 139 Small System Reporting ง141.35(d) Contact and zip code information SDWARS by December 31, 2022 Sampling location information SDWARS by December 31, 2022 Data elements PWSs must report all data elements specified in ง141.35(e) Table 1 on each sample tracking form, in their sampling kit, as appropriate Analytical results Uploaded to SDWARS by EPA's contracted laboratory Reviewed by EPA in SDWARS Small PWSs and states will have access to results via SDWARS April 2021 U.S. Environmental Protection Agency Slide 86 of 139 Page 43 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Reporting Data Elements ง141.35(e) 1. Public Water System Identification (PWSID) Code 15. Analytical Method Code 2. Public Water System Name 16. Extraction Batch Identification Code 3. Public Water System Facility Identification Code 17. Extraction Date 4. Public Water System Facility Name 18. Analysis Batch Identification Code 5. Public Water System Facility Type 19. Analysis Date 6. Water Source Type 20. Sample Analysis Type 7. Sampling Point Identification Code 21. Analytical ResultsSign 8. Sampling Point Name 22. Analytical ResultMeasured Value 9. Sampling Point Type Code 23. Additional Value 10. Disinfectant Type (Additional Details) 24. Laboratory Identification Code 11. Treatment Information (AdditionalDetails) 25. Sample Event Code 12. Sample Collection Date 26. Historical Information for Contaminant Detections and Treatment (Additional Details) 13. Sample Identification Code TJ. Potential PFAS Sources (AdditionalDetails) 14. Contaminant 28. Direct Potable Reuse Water Information (Additional Details) Data elements PWS reports at sample collection Updated data element April 2021 U.S. Environmental Protection Agency Slide 87 of 139 Disinfectant Type - Data Element 10 All of the disinfectants/oxidants that have been added prior to and at the entry point to the distribution system. Please select all that apply: PEMB = Permanganate HPXB = Hydrogen peroxide CLGA = Gaseous chlorine CLOF = Offsite generated hypochlorite (stored as a liquid form) CLON = Onsite generated hypochlorite CAGC = Chloramine (formed with gaseous chlorine) CAOF = Chloramine (formed with offsite hypochlorite) CAON = Chloramine (formed with onsite hypochlorite) CLDB = Chlorine dioxide OZON = Ozone ULVL = Ultraviolet light OTHD = All other types of d is i nfecta nt/oxida nt NODU = No disinfectant/oxidant used April 2021 U.S. Environmental Protection Agency Slide 88 of 139 Page 44 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Treatment Information - Data Element 11 Treatment information associated with the sample point. Please select all that apply. CON = Conventional (non-softening, consisting of at least coagulation/sedimentation basins and filtration) SFN = Softening RBF = River bank filtration PSD = Pre-sedimentation INF = In-line filtration DFL = Direct filtration SSF = Slow sand filtration BIO = Biological filtration (operated with an intention of maintaining biological activity within filter) UTR = Unfiltered treatment for surface water source GWD = Groundwater system with disinfection only PAC = Application of powder activated carbon GAC = Granular activated carbon adsorption (not part of filters in CON, SFN, INF, DFL, or SSF) April 2021 U.S. Environmental Protection Agency AIR = Air stripping (packed towers, diffused gas contactors) POB = Pre-oxidation with chlorine (applied before coagulation for CON or SFN plants or before filtration for other filtration plants) MFL = Membrane filtration I EX = Ionic exchange DAF = Dissolved air floatation CWL = Clear well/finished water storage without aeration CWA = Clear well/finished water storage with aeration ADS = Aeration in distribution system (localized treatment) OTH = All other types of treatment NTU = No treatment used DKN = Do not know Slide 89 of 139 No = have never tested for the contaminant DK = I do not know Historical Information for Contaminant Detections and Treatment - Data Element 26 A yes or no answer provided by the PWS for each entry point to the distribution system Question: Have you tested for the contaminant in your drinking water in the past? * YES = If yes, did you modify your treatment and if so, what types of treatment did you implement? Select all that apply. PAC = Application of powder activated carbon GAC = Granular activated carbon adsorption (not part of filters in CON, SCO, INF, DFL, or SSF) Biologically Active Carbon MFL = Membrane filtration ULVL = Ultraviolet light Other U.S. Environmental Protection Agency April 2021 Slide 90 of 139 Page 45 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Potential PFAS Sources - Data Element 2. A yes or no answer provided by the PWS for each entry point to the distribution system Question: Are you aware of any potential current and/or historical sources of PFAS that may have impacted the drinking water sources at your water system? = If yes, select all that apply: MB = Military Base FT = Firefighting training school AO = Airport Operations CW = Car Wash or Industrial Launderers PS = Public Safety Activities (e.g., fire and rescue services) WM = Waste Management HW = Hazardous waste collection, treatment and disposal, Underground Injection Well SC = Solid waste collection, combustors, incinerators MF = Manufacturing FP = Food Packaging TA = Textile and Apparel (e.g., stain- and water- resistant, fiber/thread, carpet, house furnishings, leather) PP = Paper CC = Chemical PR = Plastics and Rubber Products MM = Machinery CE = Computer and Electronic Products FM = Fabricated Metal Products (e.g., nonstick cookware) PC = Petroleum and Coal Products FF= Furniture OG = Oil and Gas Production UT = Utilities (e.g., sewage treatment facilities) CT = Construction (e.g., wood floor finishing, electrostatic painting) OT = Other No = I am not aware of any potential current and/or historical sources DK =I do not know April 2021 U.S. Environmental Protection Agency Slide 91 of 139 Direct Potable Reuse Water Information - Data Element 28 A yes or no answer provided by the PWS for each entry point to the distribution system Question: Do you use direct potable reuse as a source of water? Yes = If yes, what is the blending ratio when used? Enter blending ratio at sample point No = do not use direct potable reuse water April 2021 U.S. Environmental Protection Agency Slide 92 of 139 Page 46 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Timing of Reporting: Change Between UCMR 4 and UCMR 5 Proposal Adjust the number of days between sample collection and laboratory posting of data and adjust the number of days for PWS review of data posted by their laboratory (40 CFR 141.40(c)(6)(H) Reporting Schedule and 40 CFR 141.40(a)(5)(vi) Reporting) UCMR 4 UCMR 5 Proposed Change Specifies that laboratories must approve analytical results in EPA's electronic data reporting system within 120 days from the sample collection date and specifies that PWS have 60 days (from when the laboratory posted the data to EPA's electronic data reporting system) to review, approve, and submit their data to the State and EPA Laboratories would have 90 days from the sample collection date to post and approve analytical results in SDWARS for PWS review. Large PWSs would have 30 days to review and approve the analytical results posted to SDWARS Reason for Change: States and other stakeholders have expressed interest in earlier access to results. Laboratories and PWSs have demonstrated that shorter periods are practical. April 2021 U.S. Environmental Protection Agency Slide 93 of 139 Break (15 minutes) ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Questions on the Presentation Click on "+" next to "Questions" in the control panel (Figure 1) to submit questions/comments Type a question in the box; click send (Figure 2) Submit general clarifying questions throughout the webinar Questions will be answered in the chat box throughout the presentation Common questions will be answered at the end of each section Figure 1 ฎ Polls (0/0) IJTIฎ ฉ 0 Chat (a][x Figure 2 11 Questions [a| [Enter a question for staff! April 2021 U.S. Environmental Protection Agency Slide 95 of 139 Specific Public Water System & Laboratory Questions about UCMR 5 Public Water System (PWS)-Specific Questions UCMR Sampling Coordinator@epa.gov "My water system has five entry points, but we share three of those points with another water system. Where do I sample?" Laboratory-Specific Questions UCMR Lab ApprovaiPepa.gov "My laboratory merged with another laboratory since the last UCMR cycle, can we change our laboratory ID?" April 2021 U.S. Environmental Protection Agency Slide 96 of 139 Page 48 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Comments on the UCMR 5 Proposed Rule Go to http://www.regulations.gov Enter Docket ID EPA-HQ-GW-2020-0530 Click Search button April 2021 U.S. Environmental Protection Agency Slide 97 of 139 Comment Process/Accessing Docket The UCMR 5 docket should pop up on the next screen Click on the Comment button below the Proposed Rule E3 PROPOSED RULE Revisions to the Unregulated Contaminant Monitoring Rule for Public Water Systems; Public Meeting Comments Due May 10.2021 April 2021 U.S. Environmental Protection Agency Slide 98 of 139 Page 49 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Comment Process/Accessing Docket Enter comment and all required information on next screen Upload a document by clicking on the Browse... button Click on the Submit Comment button at the bottom of the page April 2021 U.S. Environmental Protection Agency Slide 99 of 139 Comment Process/Accessing Docket Once submitted, comments cannot be edited or removed Do not electronically submit any information you consider to be Confidential Business Information (CBI) Multimedia submissions (audio, video, etc.) must be accompanied by a written comment Written comment is considered the official comment and should include discussion of all points you wish to make EPA public comment policy is at: http://www.epa.gov/dockets/commenting-epa-dockets Comments/questions/statements raised during this meeting are not registered as official public comments April 2021 U.S. Environmental Protection Agency Slide 100 of 139 Write a Comment Read Agency Guidelines | Commenter's Checklist Comment" Start typing comment here 5000 Attach Files You can attach up to 20 files, but each fUe cannot exceed 10MB Valid file types include, bmp, docx. gif, jpg jpeg, pdf, png, pptx. rtf, sgml, tif, tiff. txt. wpd, xlsx. xmL Page 50 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Process for EPA Approval of Laboratories Supporting UCMR 5 Paul Grimmett, U.S. EPA Office of Ground Water and Drinking Water Standards and Risk Management Division Technical Support Center Overview Laboratory Approval Program General expectations Contracts for small system sample analysis Laboratory approval procedure Laboratory Approval Manual Maintaining Approval Minimum Reporting Levels (MRLs) For additional information, the document "UCMR 5 Laboratory Approval Manual" is available in the docket April 2021 U.S. Environmental Protection Agency Slide 102 of 139 Page 51 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Program is OPEN Laboratory Approval Program for UCMR 5 is expected to be similar to the process used for all previous UCMR cycles Only the EPA-approved laboratories can analyze UCMR samples collected at PWSs Approval is by method arid by individual laboratory locations A laboratory may apply for approval for any method(s) Laboratories need to meet: UCMR 5 laboratory approval program criteria Required equipment criteria Laboratory performance criteria Data reporting criteria (includes use of text file format to report to SDWARS) Labs must be approved by EPA to support UCMR 5 even if already certified or accredited by State/primacy entity for a particular method being used in UCMR 5 April 2021 U.S. Environmental Protection Agency Slide 103 of 139 Contracts for Small-System Sample Analysis EPA would need significantly more laboratory support than normal if UCMR 5 is finalized as proposed (based on the greater number of small water systems specified by America's Water Infrastructure Act of 2018 (AWIA)) In preparation for UCMR 5 monitoring, EPA anticipates soliciting proposals and awarding contracts to laboratories to support small system sample analysis prior to the end of the proficiency testing (PT) program Historically, laboratories awarded contracts by EPA have been required to first be approved to perform all methods interested laboratories are encouraged to start the Laboratory Approval Program process early April 2021 U.S. Environmental Protection Agency Slide 104 of 139 Page 52 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Laboratory Approval General Procedure Step 1: Request to Participate Step 2: Registration Step 3: Application Package Step 4: EPA Review of Application Package Step 5: Proficiency Testing (PT) Step 6: Written EPA approval April 2021 U.S. Environmental Protection Agency Slide 105 of 139 Step 1 - Request to Participate Interested laboratories submit a written request to the UCMR Lab Approval(5)epa.gov EPA provides registration material EPA provides a custom application package based on registration information April 2021 U.S. Environmental Protection Agency Slide 106 of 139 Page 53 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Step 2 - Registration Complete registration sheet typically includes: List of the UCMR methods for which the laboratory sought approval Laboratory information Mailing and shipping address Contact information Based on a January 1, 2023, anticipated start for UCMR 5 sample collection, EPA anticipates that the final opportunity for a laboratory to complete and submit the necessary registration and application information will be August 1, 2022 April 2021 U.S. Environmental Protection Agency Slide 107 of 139 Step 3 - Application Package Separate application for each method Application typically required to include: Proof of current drinking water laboratory certification (for select compliance monitoring methods) Personnel information Quality Assurance (QA) information Information regarding analytical equipment and sample handling procedures Data submission for each method (e.g., Initial Demonstration of Capability (IDC) study, QC sample results, quantification reports) Lab would receive a copy of the Laboratory Approval Manual April 2021 U.S. Environmental Protection Agency Slide 108 of 139 Page 54 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Change Between UCMR 4 and UCMR 5 Proposal: Laboratory Approval Registration and Application Deadlines Establish more flexible deadlines for laboratory approval UCMR 4 UCMR 5 Proposed Change To participate in the UCMR Laboratory Approval Program, the laboratory must complete and submit the necessary registration forms within 60 days of final rule publication, and necessary application materials within 120 days of final rule publication Proposes that the laboratory complete and submit registration and application materials to EPA by August 1, 2022 to participate in the UCMR Laboratory Approval Program Reason for change: Provide greater flexibility per laboratory interest April 2021 U.S. Environmental Protection Agency Slide 109 of 139 Step 4 - Review of Application Package EPA reviews application package If deficiencies are identified, EPA gives the lab an opportunity to make corrective actions and submit new application information If all requested information is present and acceptable, EPA notifies the laboratory that they are eligible to participate in corresponding PT studies April 2021 U.S. Environmental Protection Agency Slide 110 of 139 Page 55 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Step 5 - Proficiency Testing (PT) EPA provides method-specific PT samples EPA anticipates offering up to three (3) PT studies prior to the publication of the final rule, and at least two (2) studies after publication of the final rule Plan to participate in PTs early if interested in becoming a contract laboratory for small system work As proposed, each laboratory would be required to: Participate in at least two (2) PT studies for each method for which it seeks approval Pass a PT for each analyte in each method for which the laboratory is seeking approval Successfully report PT data to SDWARS using text file format April 2021 U.S. Environmental Protection Agency Slide 111 of 139 Step 6 - Written EPA Approval After successful participation in a PT study for a specific method, EPA expects to send the laboratory a notification letter listing the methods for which approval is either: Pending - pending promulgation of the final rule if the PT studies have been conducted prior to that time Granted - after promulgation of the final rule Laboratories receiving pending approval are expected to be granted approval without further action following promulgation of the final rule if no changes have been made to the rule that impact the laboratory approval program EPA expects to contact the laboratory if changes are made between the proposed and final rules that warrant additional action by the laboratory A list of approved laboratories and associated methods will be posted at: https://www.epa.gov/dwucmr April 2021 U.S. Environmental Protection Agency Slide 112 of 139 Page 56 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Laboratory Approval Manual Procedures for obtaining UCMR approval and procedures for revocation of approval Q.A requirements QC requirements 8 MRLverification Initial demonstration of capability Initial calibration Continuing calibration checks 8 Surrogate and internal standard criteria Reagent blanks and fortified blanks QC samples Spiked field samples 8 Field blank criteria (if required by the method) Sample handling requirements April 2021 U.S. Environmental Protection Agency Slide 113 of 139 Typical Criteria for Maintaining Approval Adhere to QA/QC measures in the methods, rule language, and the Laboratory Approval Manual Post occurrence data and required QC data via SDWARS within prescribed timeframe Respond to inquires or requests from Laboratory Approval Coordinator Participate in and pass on-site and/or paper audits April 2021 U.S. Environmental Protection Agency Slide 114 of 139 Page 57 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Reporting Limit Background The minimum reporting level (MRL) is the minimum quantitation level that, with 95% confidence, can be achieved by capable analysts at 75% or more of the laboratories nationwide using a specified analytical method EPA establishes the MRL using data from multiple laboratories performing "Lowest Concentration Minimum Reporting Level" (LCMRL) studies to identify their capability Each single-laboratory lowest concentration MRL (LCMRL) is the lowest true concentration for which the future recovery is predicted to fall, with high confidence (99%), between 50 and 150% recovery Lowest concentration that measurements of specified quality can be made by a particular laboratory Simultaneous application of precision and accuracy April 2021 U.S. Environmental Protection Agency Slide 115 of 139 MRLs Established to achieve quality and consistency across all UCMR laboratories, while allowing for appropriate national laboratory capacity MRLs are generally established as low as is feasible; typically lower than current HRLs and health advisories EPA will consider adjusting MRLs if there is confirmed and recurring evidence that an MRL is unattainable/impractical April 2021 U.S. Environmental Protection Agency Slide 116 of 139 Page 58 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Proposed MRLs for UCMR 5 Analyte CASRN Analytical Method MRL ll-chloroeicosafluoro-3-oxaundecane-l-sulfonic acid (HCI-PF30UdS) 763051-92-9 EPA 533 0.005 pg/L 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS) 39108-34-4 EPA 533 0.005 pg/L 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS) 757124-72-4 EPA 533 0.003 pg/L 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS) 27619-97-2 EPA 533 0.005 pg/L 4,8-dioxa-3H-perfluorononanoic acid (ADONA) 919005-14-4 EPA 533 0.003 pg/L 9-chlorohexadecafluoro-3-oxanone-l-sulfonic acid (9CI- PF30NS) 756426-58-1 EPA 533 0.002 pg/L hexafluoropropylene oxide dimer acid (HFPO-DA)(GenX) 13252-13-6 EPA 533 0.005 pg/L nonafluoro-3,6-dioxaheptanoic acid (NFDHA) 151772-58-6 EPA 533 0.02 pg/L April 2021 U.S. Environmental Protection Agency Slide 117 of 139 Proposed MRLs for UCMR 5 Analyte CASRN Analytical Method MRL perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) 113507-82 "7 EPA 533 0.003 pg/L perfluoro-3-methoxypropanoic acid (PFMPA) 377-73-1 EPA 533 0.004 pg/L perfluoro-4-methoxybutanoic acid (PFMBA) 863090-89-5 EPA 533 0.003 pg/L perfluorobutanesulfonic acid (PFBS) 375-73-5 EPA 533 0.003 pg/L perfluorobutanoic acid (PFBA) 375-22-4 EPA 533 0.005 pg/L perfluorodecanoic acid (PFDA) 335-76-2 EPA 533 0.003 pg/L perfluorododecanoic acid (PFDoA) 307-55-1 EPA 533 0.003 pg/L perfluoroheptanesulfonic acid (PFHpS) 375-92-8 EPA 533 0.003 pg/L April 2021 U.S. Environmental Protection Agency Slide 118 of 139 Page 59 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Proposed MRLs for UCMR 5 Analyte CASRN Analytical Method MRL perfluoroheptanoic acid (PFHpA) 375-85-9 EPA 533 0.003 pg/L perfluorohexanesulfonic acid (PFHxS) 355-46-4 EPA 533 0.003 pg/L perfluorohexanoic acid (PFHxA) 307-24-4 EPA 533 0.003 |ig/l perfiuorononanoic acid (PFNA) 375-95-1 EPA 533 0.004 pg/L perfluorooctanesulfonic acid (PFOS) 1763-23-1 EPA 533 0.004 pg/L perfluorooctanoic acid (PFOA) 335-67-1 EPA 533 0.004 pg/L perfluoropentanesulfonic acid (PFPeS) 2706-91-4 EPA 533 0.004 pg/L perfluoropentanoic acid (PFPeA) 2706-90-3 EPA 533 0.003 pg/L April 2021 U.S. Environmental Protection Agency Slide 119 of 139 Proposed MRLs for UCMR 5 Analyte CASRN Analytical Method MRL perfluoroundecanoic acid (PFUnA) 2058-94-8 EPA 533 0.002 pg/L n-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) 2991-50-6 EPA 537.1 0.005 pg/L n-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) 2355-31-9 EPA 537.1 0.006 pg/L perfluorotetradecanoic acid (PFTA) 376-06-7 EPA 537.1 0.008 pg/L perfluorotridecanoic acid (PFTrDA) 72629-94-8 EPA 537.1 0.007 pg/L Lithium 7439-93-2 EPA 200.7, SM 3120 B, ASTM D1976-20 9 pg/L April 2021 U.S. Environmental Protection Agency Slide 120 of 139 Page 60 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Stakeholder Statements & Discussion Statements from Stakeholders that registered ahead of time Statements from Stakeholders that submit via the chat function of the webinar (subject to the availability of time) Process for Submitting Public Comments ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Comments on the UCMR 5 Proposed Rule Go to http://www.regulations.gov Enter Docket ID EPA-HQ-GW-2020-0530 Click Search button April 2021 U.S. Environmental Protection Agency Slide 123 of 139 Comment Process/Accessing Docket The UCMR 5 docket should pop up on the next screen Click on the Comment button below the Proposed Rule E3 PROPOSED RULE Revisions to the Unregulated Contaminant Monitoring Rule for Public Water Systems; Public Meeting Comments Due May 10.2021 April 2021 U.S. Environmental Protection Agency Slide 124 of 139 Page 62 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Comment Process/Accessing Docket Enter comment and all required information on next screen Upload a document by clicking on the Browse... button Click on the Submit Comment button at the bottom of the page April 2021 U.S. Environmental Protection Agency Slide 125 of 139 Comment Process/Accessing Docket Once submitted, comments cannot be edited or removed Do not electronically submit any information you consider to be Confidential Business Information (CBI) Multimedia submissions (audio, video, etc.) must be accompanied by a written comment Written comment is considered the official comment and should include discussion of all points you wish to make EPA public comment policy is at: http://www.epa.gov/dockets/commenting-epa-dockets Comments/questions/statements raised during this meeting are not registered as official public comments April 2021 U.S. Environmental Protection Agency Slide 126 of 139 Write a Comment Read Agency Guidelines | Commenter's Checklist Comment" Start typing comment here 5000 Attach Files You can attach up to 20 files, but each fUe cannot exceed 10MB Valid file types include, bmp, docx. gif, jpg jpeg, pdf, png, pptx. rtf, sgml, tif, tiff. txt. wpd, xlsx. xmL Page 63 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Closing Remarks Thank you for participating in the UCMR 5 proposal discussion If You Have Questions Following This Webinar UCMR Homepage https://www.epa.gov/dwucmr Contacts Brerida Bowden: bowden.brenda(a)epa.gov Melissa Simic: simic.melissa(5)epa.gov Lab Approval Program UCMR Lab Approval(5)epa,gov UCMR Sampling Coordinator UCMR Sampling CoordinatorfSepa.gov Safe Drinking Water Information https://www.epa.gov/ground-water-and-drinking-water/safe-drinking-water- in formation Meeting materials were sent to all registered participants If you did not receive a copy, please email UCMRwebinar@cadmusgroup.com and we will send you a copy April 2021 U.S. Environmental Protection Agency Slide 128 of 139 Page 64 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Abbreviations and Acronyms Abbreviations and Acronyms HCI-PFBOUdS - ll-Chloroeicosafluoro-3-Oxauridecane-l-Sulfonic Acid 4:2 FTS - 1H, 1H, 2H, 2H-Perfluorohexane Sulfonic Acid 6:2 FTS - 1H, 1H, 2H, 2H-Perfiuorooctane Sulfonic Acid 8:2 FTS - 1H, 1H, 2H, 2H-Perfluorodecane Sulfonic Acid 9CI-PF30NS - 9-Chlorohexadecafluoro-3-Oxanone-l-Sulfonic Acid ADONA - 4,8-Dioxa-3H-Perfluorononanoic Acid ATSDR - Agency for Toxic Substances and Disease Registry AWIA - America's Water Infrastructure Act of 2018 BCAN - Bromochloroacetonitrile CBI - Confidential Business Information April 2021 U.S. Environmental Protection Agency Slide 130 of 139 Page 65 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Abbreviations and Acronyms CCL - Contaminant Candidate List CDR-Chemical Data Reporting CDX-Central Data Exchange CFR - Code of Federal Regulations CWS - Community Water System DBAN Dibromoacetonitrile DBP - Disinfection Byproduct DBP-ICR - Disinfection Byproduct Information Collection Rule DCAN - Dichloroacetonitrile EPA - Environmental Protection Agency EPTDS - Entry Point to the Distribution System April 2021 U.S. Environmental Protection Agency Slide 131 of 139 Abbreviations and Acronyms FR - Federal Register GenX - Trade Name for a Technology Used to Make High- Performance Fluoropolymers Without the Use of PFOA GWRMPs - Ground Water Representative Monitoring Plans HA - Office of Water Health Advisory Health Canada - Health Canada Guidelines for Canadian Drinking Water Quality HESD - Health Effects Support Document HFPO-DA - Hexafluoropropylene Oxide Dimer Acid IARC - International Agency for Research on Cancer April 2021 U.S. Environmental Protection Agency Slide 132 of 139 Page 66 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Abbreviations and Acronyms ICP-AES - Inductively Coupled Plasma- Atomic Emission Spectrometry IDC - Initial Demonstration of Capability IRIS - Integrated Risk Information System kg-Kilograms L-Liter LC/MS/MS - Liquid Chromatography/Tandem Mass Spectrometry LCMRL - Lowest Concentration Minimum Reporting Level LOAEL - Lowest-Observed-Adverse-Effect Level MAC - Maximum Acceptable Concentration April 2021 U.S. Environmental Protection Agency Slide 133 of 139 Abbreviations and Acronyms MCLG - Maximum Contaminant Level Goal MDBP - Microbial and Disinfection Byproduct mg- Milligrams MMWR - Center for Disease Control and Prevention's Morbidity and Mortality Weekly Reports MRL - Minimum Reporting Level NAWQA - National Water-Quality Assessment NCOD - National Contaminant Occurrence Database NDAA - National Defense Authorization Act NEtFOSAA - N-Ethyl Perfluorooctanesulfonamidoacetic Acid NFDHA- Nonafluoro-3,6-Dioxaheptanoic Acid April 2021 U.S. Environmental Protection Agency Slide 134 of 139 Page 67 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Abbreviations and Acronyms NIRS - National Inorganics and Radionuclides Survey NMeFOSAA- N-Methyl Perfluorooctanesulfonamidoacetic Acid NOAEL- No-Observed-Adverse-Effect Level NPDWRs - National Primary Drinking Water Regulations NTNCWS - Non-Transient Non-Community Water System OGWDW - Office of Ground Water and Drinking Water PBT - Persistent, Bioaccumulative, and Toxic PFAS - Per- and Polyfluoroalkyl Substances PFBA - Perfluorobutanoic Acid PFBS - Perfluorobutanesulfonic Acid April 2021 U.S. Environmental Protection Agency Slide 135 of 139 Abbreviations and Acronyms PFDA - Perfluorodecanoic Acid PFDoA - Perfluorododecanoic Acid PFEESA- Perfluoro (2-Ethoxyethane) Sulfonic Acid PFHpA Perfluoroheptanoic Acid PFHpS - Perfluoroheptanesulfonic Acid PFHxA - Perfluorohexanoic Acid PFHxS - Perfluorohexanesulfonic Acid PFMBA - Perfluoro-4-Methoxybutanoic Acid PFMPA- Perfluoro-3-Methoxypropanoic Acid PFNA-Perfluorononanoic Acid April 2021 U.S. Environmental Protection Agency Slide 136 of 139 Page 68 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Abbreviations and Acronyms PFOA - Perfluorooctanoic Acid PFOS- Perfluorooctanesulfonic Acid PFPeA- Perfluoropentanoic Acid PFPeS - Perfluoropentanesulfonic Acid PFTA - Perfluorotetradecanoic Acid PFTrDA - Perfluorotridecanoic Acid PFUnA - Perfluoroundecanoic Acid PPRTV - Provisional Peer-Reviewed Toxicity Values PT - Proficiency Testing PWS - Public Water System April 2021 U.S. Environmental Protection Agency Slide 137 of 139 Abbreviations and Acronyms PWSID - Public Water System Identification Code QA - Quality Assurance QC - Quality Control RfD - Reference Dose SDWA - Safe Drinking Water Act SDWARS-Safe Drinking Water Accession and Review System SPE - Solid Phase Extraction TCAN-Trichloroacetonitrile TNCWS - Transient Non-Community Water System TOF-Total Organic Fluorine April 2021 U.S. Environmental Protection Agency Slide 138 of 139 Page 69 of 70 ------- Revisions to the Unregulated Contaminant Monitoring Rule (UCMR 5) Abbreviations and Acronyms TSCA - Toxic Substance Control Act UCM - Unregulated Contaminant Monitoring UCMR - Unregulated Contaminant Monitoring Rule ug - Micrograms USGS - United States Geological Survey WHO - World Health Organization April 2021 U.S. Environmental Protection Agency Slide 139 of 139 Page 70 of 70 ------- |